Building stave



0d. 11, 1932. G. E. PRIEST 1,882,301

BUILDING STAVE Filed Jan. 7, 1930 2 Sheets-Sheet l INVENTOR Patented a.11, 1932 I 1 882 301 UNITED STATES PATE T OFFICE- i y Application filedJanuary 7, 1930. Serial No. 419,036.

This invention relates to sectional structaken with the drawingsin whichFig. 1 is a tures and more particularly to staves for side elevation ofa portion of a bin or silo bins silos and the like. formed of the stavesof. the present inven- It has been the practice in the past to contion;Fig. 2 is a top view of a section of such struct bins or silos ofsectional staves formed a bin or silo; Fig. 3 is a front elevation of ofconcrete or other similar plastic material, the present stave; Fig. 4 isa side elevation but much difiiculty has been encountered due thereofand Fig. 5 is acrosssection'al viewof to the fact that these staves wereimproperly the stave of Fig. 3 taken on 'the line 55 designed toWithstand strains and stresses while Fig.- 6 is an end ortop'view of astave,

to which they were subjected in use. This and Figs. 7 and 8 arecross-sectional-viewsdifficulty has existed in spite of the fact that ofsuch a stave taken respectively on the; these staves have included anexcessive lines 7 8 8 of Fig. 3.- Y i Y amount of concrete with theresultant in- In Fig. 1, ,10 generally designatesa section crease incost of material and the additional of a bin or silo comprisingasuitable founda 1 expense entailed in handling and shipping tion 11011which there aremounted a series.

them. of-staves 12 and 13 in interlocking relation.

In accordance with the present invention and held in place by hoops 19.It will be a novel stave has been produced which furnoted that thestaves 12 and 13 are of unequal nishes the required tensile strength atthe length so that joints between laterally adis points most needed toavoid. cracking of the jacent staves do not come together..- By ref- 5?staves when the hoops are tightend or when erence to Figs. 4 and 5 itwill be notedthat maximum loads are applied either from loadthe top ofeach stave is provided with a ing the bin or silo itself or from windpresgroove 14 while the bottom thereof is prosure. The present design ofstave is strong vided with a tongue 15 so that the ton'gueof' enough tocarry maximum loads and light one stave may engage the roomer-an ad+ 7enough because of the small amount of conacent stave. Similarly eachstave, ispro crete used so that shipping weight and lavided with alateral groove 16 and a lateral bor in handling permit prices to meetcomtongue 17 so that adjacent staves may'inter-' petition. One of themain features of the lock. vIt has been found through extensive.

invention consists in increasing the thickuse of concrete stavesthatagreat deal of ness and contact area of both sides of the breakage occursata'bout five inchesfro'm any stave where the hoop bears and inshortenunreenforced corner. Y ing the span between hoop bearings, sothat I have discovered that br'eakage'may be 11 the load bearing on bothedges of the stave duced to a minimum andthe total weight of 35 isequalized. A further feature of the ineach stave reduced if each edge ofthe stave vention consists in providing the outer suris provided with aseries of projections "or face of each stave of undulating or wavy hoop;bearing portions 20 to 25 inclusive. contour so that there are shorterspans be- Each such bearing portion slopes tothe main' tween hoopcontacts and a greater area of body ofthe stave {and the base of eachpro 4 concrete under compression to support a jection orbearing portionmerges intothe maximum load while there is a total reducbody and intothe base of theadjacent pro-1' tion in weight of concrete in each staveover jections so that the base of such portion-is that now used.relatively large in area so that a rather large These and other featureswill appear from amount of concrete is under compression. the detaileddescription and claims when By reference to Figs. 3 to 8'inclusive itWill 9114"- be noted that these hoop bearing portions are so disposedthat the face of the stave has an undulating contour vertically andhorizontally of the stave. It will further be seen that the groove 26 isrelatively wide so that it will be engaged by the hoop even though thestave is somewhat'warped as sometimes occurs. Furthermore, the bottom ofthe groove 26 is soshaped that longitudinally it engages a considerableportion of each hoop. In addition the spans between .ad-

jacent contacts and 21'or 22 and 23 are so short (being less than twicethe length of groove 26 in Fig. 7 that the stave is not materiallyweakened although its volume and weight are considerably reduced. Ineffect the contour of the stave is such that-itemploys the principle ofthe flat slab and beam construction with the result'that a'maximumamount of concrete is used where the load is applied 1 without undulyincreasing the weight ofthe stave so that a durable, commercial stave isprovided.

: What I claim is: v H

1 A building stave comprising a body and integral projections on oneside thereof along opposite sides of the median line of the body,between saidmedian line and the-side edges of the body, said projectionson each side of said linebeing paired with, and arranged in horizontalalinement with", those on the other side of the line and being taperedfrom their bases toward their outer ends and having hoop receiving seatsat their'outer ends, the base of each projection merging in the body andinto the'baseof the adjacent projections,

of the body, said projections on each side of whereby the force appliedto the said projections by the'hoop is distributed throughout the body;

12. A buildin stave comprisinga body and integral projections on oneside thereof along opposite sides of the median line of the body betweensaid median line and the side edges said line beingpaired with, andarrangedin horizontal 'alinement with, those on the other side of'theline and being tapered from their bases toward their outer ends andhaving hoop receiving seats at their outer ends,-the

base of eachprojection' merging in'the body andinto the base of theadjacent projections,

the bases also extending to the lateral edges ofthestave, whereby'theforce applied to the said projections by the hoop is distributedthroughout the body'.

3.'.A reinforced concrete building stave having integral hoop contactingprojections on its outer face and arranged along the lengthwise marginsthereof on opposite sides ofthe median line of the stave, theprojections on each side of said line being paired with those on theother and arranged in transverse alinement therewith, the base of eachprojection-merging into the body and into the base of the adjacentprojections, -and'hav-'

